Hello Katrina, I'm not sure what kind of census data you are looking for. I went on ancestry.com and quickly found the family in the 1905 state census and the 1910 federal census. They are in Jackson Co. Northfield township in each. For 1905 they are on page 6 of 11, living with their son, Olas Larson:
Olas head of household age 31
Petra wife age 24
Alvin son age 3
Herman son age 1
John son age 1/12
Albert brother age 22
Oluf father age 64
Anna mother age 57
Oscar brother age 15
Selma sister age 12

In the 1910 census they are on page 13 of 21:
Oluf Larson age 69 mar 39 yrs immigrat 1868
Anna age 62 mar 39 yrs 7 of 10 children alive immigrat 1868
Albert age 27
Selma age 17

Let me know if there is something specific you would like to know or if I can help you further.
Jane